Envelop.



a. L. RHEUT AN.

ENVELOP.

APPLICATION FIEED OCT-2|. 19M.

1,136,614. Patented Apr. 20, 1915.

; I) MISSIONS; CHURCH am/ Menu UNITED STATES PATENT orrron.

ISAAC I4. RHEUTAN, OF RICHMOND, VIRGINIA, ASSIGNOR TO UNION ENVELOPE COMPANY, OF RICHMOND, VIRGINIA, A CORPORATION OF VIRGINIA;

ENVELOP.

Specification of Letters latent.

Patented Apr. 20, 1915.

Application filed October 21, 1914. Serial No. 867,819.

To all whom it may concern:

Be it known that I, ISAAC L. RHEUTAN, a citizen of the United States, residing at Richmond, in the county of Henrico and State of Virginia, have invented certain new and useful Improvements in Envelope;

and I do hereby declare the following to be adapted.

One of the objects of my invention is to provide an envelop of this type, which may be made up on the ordinary machine invless time than those envelops heretofore in use.

Another object of my invention is to form the blank in such manner that the surface upon which the identification number is stamped, will be smooth and without seam.

A further object is to provide an envelop which may be sealed, without having the ferred embodiment thereof is the 'following specification, illustrated 1n users tongue come in contact with the adhesive. Y

To the above mentioned ends, the inven tion primarily contemplates an envelop of the duplex type, embodying means in connection with the back flap which allow said back flap to be folded in making up the en-,

velop before the machine folders for the side flaps have been withdrawn.

The essential features of the invention involved in the novel form of blank and arrangement of the adhesive, is susceptible to structural modification, without departing from the scope of my invent1on but a predescribed in the accompanying drawings, and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is aplan view of my improved envelop blank. 'Fi 2 is a similar view showing the side flaps olded. Fig. 3 is a plan view rom the rear showing the back flap folded upon the side flaps. Fig. 4 is a plan View showing the completed envelop.

The numeral 1 designates the main bodyv portion of my improved envelop, which is rectangular in shape, and is provlded on its lateral edges with side flaps 2, on its lower edge with a back flap 3, and on its upper edge-with a sealing flap 4'. These flaps are folded along the lines 5, 6 and 7 respectively, to form the complete envelop. The side fiaps2 are provided with extensions 8 for a purpose hereinafter described and in making up the envelop they are folded over on the lines 5 and have their then visible surface provided with an adhesive 9. The back flap 3 corresponds approximately in form and dimensions to the body portion 1, upon. which it is superposed when folded to provide a'-=large unbroken surface upon the rear of the'envelop for the purpose of printing informative data. Adhesive 10 is applied upon the back flap 3 and upon the body portion intermediate their lateral edges and when the envelop is folded this forms the two pockets for the twin envelop. By providing the gum 10 upon both the body portion and the back flap 3, a decided improvement is gained from a mechanical standpoint. For example, an adhesive in order to cause two surfaces of paper to adhere or unite, must soften and penetrate the fibers of the paper, or the gum will crystallize between the two surfaces when they are brought together, and there will not be a permanent adhesion after the gum is thoroughly dry. This defect often causes the contents of the envelop to break through the gummed edge after the envelop has been torn apart to form two envelops. By employing a double strip of gum as shown in the drawings, both of the surfaces when brought together are gummed and penetrated by moisture and consequently the adhesion is better and more complete than when a moist surface and a dry one are brought together, as in the envelops hereto fore known. A score line 11 is provided across the face of the completed envelop intermediate its ends for the purpose of separating the sealed pockets. Notches or cutout portions 12 areprovided in the corners of the back flap, and similar notches or recesses 13 are provided in the corners of the sealing flap 4, and are adapted to register with the notches 12 when the envelop is completely folded. 1

The particular advantages gainedin providing the seal and back flaps with regising of only two thicknesses-of paper, void the envelop for the purpose of identification, may be printed on a smooth surface conslstof seams, thereby assuring, the printer a surface that will always permit a clear and distinct impression to be made. Second. The

I side flaps may be folded and-held down by the side folders used in making the envelop,

while the back'flap is being brought down upon them by the back folder. p

Themethod of foldin an envelop from a died out blank as f0 lows: The blank is I picked-11p from the top of a'pile of blanks,

. which are placedon theelevator of the folding machine by the pickers, which have been v supplied with a coat of gum and placed on a .con'veyer which carries them to the folding box. This foldingbox is of a size approximately the size of the folded envelop. When the envelo blank has been broughtdirectly over the oldingbox, a plunger forces the blank down through the foldingbox to the bed of the machine, thereby creasing the blank on the four edges of the body of the envelop. and leaving all four flaps standing in a' perpendicular position. Attached to the bed of the machine of each of the four sides of the-folding box are the folders,

' of thefolders cannotbe operated simultaated contemporaneouskyli is then operated and the sealing flap.

In making envelops as heretofore con-.

I z I vfolders, after theyhad operated, before the back folder could fold the back flap. To do neousl but operate in the following order,

v1z: irst, the two side folders are actu-- The back folder ally the folder for structed, it. was necessary to raise the side this it was essential to employ side folders which have a rapid oscillating motion, that and returned to normal position before the back folder is started down. In doing this the blank is left without any control to hold it in position on the bed of the machine and it frequently moves from its proper position I before the folders perform theirfunctions.

, .Again, the returning of these side folders before the back folder operates, diminishes 5'5 and 1ts daily product is accordingly de-- the eed .of the machine very materially,

L creased. In malnng my improved envelop,

side folders can be used which have pro- Jections. on them that are dapted to engage the extensions 8 to fold he side flaps and owing to the back and seal flaps be a; notched, as heretofore described, the bac and seal flaps-can be folded before the side folders are raised. In other. words, all of "the folders can be operated at very nearly sealing flap folder.

is, the side folders must be brought down' timed just in advance ofthe back folder and the back folder just advance of the The adhesive for sealing the top or sealing flap 4 is provided at 15 upon the back flap 3 and an envelop manufactured in this 7 manner in the twin style is most desirable for the reason that when the gum is applied, there is danger, especially in damp weather, of the gum not-drying on the seal flap before the envelops are boxed up, causing the flap to adhere to the body of the envelop. It is also a fact, that the adhesive 10 which divides the envelop into two compartments does not dry'thoroughly for a long period after the envelops are made,

and when the envelops are boxed up, the moisture which emanates from the dividing line of adhesive, causes the top flap when gum is provided thereon, to stick at this point, thereby making the envelop unfit for use on an automatic printing machine. By applying the gum to the body of the envelop this defect will be eliminated. A fur,- ther advantage in applying the adhesive 15 upon the back flap is that the seal flap always lies straight and does not curl after the envelop is made. It is a well known fact that when gum is applied to paper, the paper immediately curls on account of the moisture in the gum. Where the seal flap is short, as is necessary in a duplex envelop, it is diflicult to control the position of the seal flap while the envelop is drying in the drying chain of the envelop machine. Omitting the gum from the seal flap and placing it on the back flap 3 allows the envelop machine to increase its production.

Also in feeding this type of envelop into automatic printlng presses, the blades or fingers which do the feeding, pass under the; sealing flap between the 4 ap and the body of the envelop, to feed the envelops one at a time to the grippers. If the sealing flaps are stuckdown, as often happens, the feed misses and as the dating and numbering mechanism of the printing press is designed for continuous feed, the printing is disarranged on aset of fifty-two envelops,-and the machine has to be stopped, and the dates and numbers reset, thereby causing great annoyance and loss of material. By my improvement the drying can vbe better taken care of and the liability of adhering flaps is decreased to a minimum and also the user or sealer of .the envelops does not have to bring his tongue into contact with the adhesive, he, merely moistem'ng the seal flap 4 and pr'essin it into contact with the adhesive 15. t is also obvious that by placing the gum uponthe back flap, the moistening of the sealing flap does not remove any fore oing, that I have devised an improved as the body portion and bein provided at enve op, which has particular ments for its corners with notches, an the sealing the purpose intended and one which may flap being superposed upon the said back be made at greater speed and at less expense flap and having its corners notched to cor- 35 5 than those heretofore known. H1 respond with the notched portions of the What I claim and desire to secure by Letback flap whereby said notched portions ters Patent is will register over the side flaps in the com- 1. An envelop comprising a body portion plete envelop. provided with side flaps, a back and a seal- 3. An envelop comprising a body portion 40 10 mg flap, the side flaps bemg folded inwardly provided with side flaps, a back and a sealupon the bod and being provided with an mg flap, the side flaps being folded inadhesive, sai back flap being of approxiwardly upon the body and being provided mately the same dimensions asthe body and with an adhesive, said back flap being of beingsuperposed upon the side flaps, and approximately the same dimensions as the 45 15 registering notches rovided-in said back body and being superposed upon the side and sealing flaps a apted to re 'ster over flaps, and registering notches provided in said side aps when all of sai flaps are said back and sealing flaps, whereby the folded, whereby the folders for the side folders for the side flaps, used in manufacflaps, used in manufacturing an envelop, turing an envelop, ma remain depressed 20 ma remain depressed while the back and while the back and sea ing flaps are being sea in flaps are being folded. folded, and an adhesive provided upon the 2. twln envelop comprising a body porupper outer surface of said back flap for tion provided with side fla s, a back and a engagement with the sealing flap when the Y sealing flap, the sidefiaps eing folded inenvelop is closed. 2 ward upon the body and being provided In testimony whereof I aflix my signature,

with (and adhesiveZ1 and the back flalp belilng in the presence of two witnesses. provi e interme iate its en s wit a 'ne of adhesive which divides the envelop into ISAAC RHEUTAN' two ockets when the back fla is'super- Witnesses: osed uponthe side fla s, sai back flap WM. A. LOEHR, eing of approximately tlib same dimensions W. W. Wmeo. 

